Suggestion: use rotary encoder to select digital inputs

[zas]

I don't know what's planned for rotary encoder, but it would be great to have the option to use it as source selector.

With push button and addon B, it could be:

• normal position, select between digital inputs
• in pushed position, select presets

Together with volume potentiometer, it'd pretty near usual preamp features.

Of course an alternative use is as volume controller. Various options should be offered by default imho.

[zas]

freeDSP-aurora/SOURCES/WEBAPP/js/aurora.js

Lines 261 to 266 in 681eaee

	function changeSPDIF(id){
	var data={};
	data.len=3;
	data.i2c=["0x82", "0x01", document.getElementById(id).value];
	fetch("/addoncfg",{method:"POST",headers:{"Content-Type": "application/json"},body:JSON.stringify(data)});
	}

is the code switching inputs inside the web interface

For AddonB, server side it is handled by

freeDSP-aurora/SOURCES/WEBAPP/ESP32/aurora/web.cpp

Lines 1714 to 1729 in 0c6edf7

	if( Settings.addonid == ADDON_B )
	{
	JsonObject root = jsonDoc.as<JsonObject>();
	int len = root["len"].as<String>().toInt();
	for( int ii = 0; ii < len; ii++ )
	Serial.println( root["i2c"][ii].as<String>() );
	currentAddOnCfg[0] = (uint8_t)strtoul( root["i2c"][0].as<String>().c_str(), NULL, 16 );
	currentAddOnCfg[1] = (uint8_t)strtoul( root["i2c"][1].as<String>().c_str(), NULL, 16 );
	currentAddOnCfg[2] = (uint8_t)strtoul( root["i2c"][2].as<String>().c_str(), NULL, 16 );
	Wire.beginTransmission( currentAddOnCfg[0]>>1 ); //ADDONB_SPDIFMUX_ADDR
	Wire.write( currentAddOnCfg[1] ); // regaddr
	Wire.write( currentAddOnCfg[2] ); // data
	Wire.endTransmission( true );
	}

From that, I'm not sure how to proceed, I don't know enough about addons internals & input configuration.